Are there any side effects?

Although uncommon, a small percentage of people are allergic to pine pollen (about 1.5%-10% of the population depending on location). Allergies are generally mild ranging from rhinoconjunctivitis to mild asthma in extremely susceptible people. If you have any previous sensitivity to pollens, you may want to begin slowly with pine pollen, beginning with a tiny doses, until you are positive that there is no sensitivity.